Source: https://lore.kernel.org/u-boot/20220222013131.3114990-3-pgwipeout@gmail.com/
Upstream: no

From: Peter Geis <pgwipeout@gmail.com>
To: Peng Fan <peng.fan@nxp.com>, Jaehoon Chung <jh80.chung@samsung.com>
Cc: Peter Geis <pgwipeout@gmail.com>, u-boot@lists.denx.de
Subject: [PATCH v1 02/11] mmc: sdhci: allow disabling sdma in spl
Date: Mon, 21 Feb 2022 20:31:21 -0500

Rockchip emmc devices have a similar issue to Rockchip dwmmc devices,
where performing dma to sram causes errors with suspend/resume.
Allow us to toggle sdma in spl for sdhci similar to adma support, so we
can ensure dma is not used when loading the sram code.

Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
---
 drivers/mmc/Kconfig | 7 +++++++
 drivers/mmc/sdhci.c | 6 +++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index f04cc44e1973..1e4342285ce7 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -468,6 +468,13 @@ config MMC_SDHCI_SDMA
 	  This enables support for the SDMA (Single Operation DMA) defined
 	  in the SD Host Controller Standard Specification Version 1.00 .
 
+config SPL_MMC_SDHCI_SDMA
+	bool "Support SDHCI SDMA in SPL"
+	depends on MMC_SDHCI
+	help
+	  This enables support for the SDMA (Single Operation DMA) defined
+	  in the SD Host Controller Standard Specification Version 1.00 in SPL.
+
 config MMC_SDHCI_ADMA
 	bool "Support SDHCI ADMA2"
 	depends on MMC_SDHCI
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 766e4a6b0c5e..6285e53d12a2 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -70,7 +70,7 @@ static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
 	}
 }
 
-#if (defined(CONFIG_MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
+#if (CONFIG_IS_ENABLED(MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
 static void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data,
 			      int *is_aligned, int trans_bytes)
 {
@@ -177,7 +177,7 @@ static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data)
 		}
 	} while (!(stat & SDHCI_INT_DATA_END));
 
-#if (defined(CONFIG_MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
+#if (CONFIG_IS_ENABLED(MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
 	dma_unmap_single(host->start_addr, data->blocks * data->blocksize,
 			 mmc_get_dma_dir(data));
 #endif
@@ -836,7 +836,7 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 #endif
 	debug("%s, caps: 0x%x\n", __func__, caps);
 
-#ifdef CONFIG_MMC_SDHCI_SDMA
+#if CONFIG_IS_ENABLED(MMC_SDHCI_SDMA)
 	if ((caps & SDHCI_CAN_DO_SDMA)) {
 		host->flags |= USE_SDMA;
 	} else {
